Search

NA61/SHINE is a large-acceptance fixed-target experiment conducted at the CERN SPS. The experiment has measured charged kaon production in 0-10% central Ar+Sc collisions at beam momenta of 13A, 19A, 30A, 40A, 75A, and 150A GeV/c. In this report, we present the measurements of KS0 production and charged-to-neutral kaon ratio in 0-10% central Ar+Sc collisions at 75A GeV/c. The results are compared to the charged and neutral kaon production in other collision systems measured by NA61/SHINE, as well as to model predictions and data from other experiments. [ABSTRACT FROM AUTHOR]

The system size dependence of strangeness production in highenergy collisions was studied using Run 2 data from the ALICE experiment at the LHC. The analysis examines the ratios of strange hadron yields to pion yields as a function of mid-rapidity charged particle multiplicity ⟨dNch/dη)|η|&0.5, offering insights into the mechanisms driving strangeness enhancement across different collision systems (pp, p–Pb and Pb–Pb). The yield ratios exhibit a continuous rising trend from low-multiplicity pp collisions at √s = 7 TeV to central Pb–Pb collisions at √sNN = 5.02 TeV. Additionally, the evolution of the mean transverse momentum (⟨pT⟩) for various strange hadrons (KS0, Λ(Λ¯), Ω±, Ξ±) is analyzed, revealing that ⟨pT⟩ does not connect smoothly between different collision systems, with harder spectra observed in high-multiplicity pp collisions compared to the peripheral Pb–Pb collisions. Finally, performa plots from LHC Run 3 are presented, showcasing the purity of Ξ− and Ω− invariant mass distributions and highlighting the enhanced detector capabilities in Run 3. [ABSTRACT FROM AUTHOR]

For many years, significant efforts at the LHC have been put towards the measurements of the production of (anti)(hyper)nuclei in high-energy hadronic collisions. The ALICE experiment has contributed with measurements in pp, p–Pb, Xe–Xe, and Pb–Pb collisions, at various center-of-mass energies. Recently, also the LHCb experiment has measured the production of nuclei in both collider and fixed-target modes. The highlights of recent experimental measurements are discussed in the context of the production models used to describe the hadronization mechanism. [ABSTRACT FROM AUTHOR]

This paper presents a study on kink reconstruction for long-lived particle (LLP) searches in the Time Projection Chamber (TPC) of the International Large Detector (ILD) at a future Higgs factory. We develop improved methods to reconstruct kinks' position and associated track momenta, resulting in improved kink mass resolution. We study the perfomance for kinks from long-lived hadron decays inside the TPC. [ABSTRACT FROM AUTHOR]

The Future Circular Collider electron-positron (FCCee) feasibility study involves assessing the capabilities and performances of potential detector configurations. This study focuses on the impact of various detector parameters on tracking performances. Specifically, the influence of different geometries, material budgets, and magnetic field strengths on the precision and efficiency of tracking performance within the CLIC-Like Detector is investigated. Tracking performance is evaluated using full simulations. This study provides valuable insights into optimising the design parameters of the FCCee detector to achieve high tracking performance, contributing essential information for the ongoing FCCee feasibility study and future collider detector development. [ABSTRACT FROM AUTHOR]

For ILD, one of the detector concepts for the proposed International Linear Collider, a time projection chamber (TPC) is foreseen as the central tracking detector. The R&D effort within the LCTPC collaboration has been centred around a common infrastructure setup operated at the DESY II Test Beam Facility. This setup includes a large field cage as test bed for the different readout technologies to be studied under comparable conditions. A second iteration of this field cage has recently been constructed to improve on the shortcomings noticed with its predecessor. The construction was repeatedly delayed and interrupted due to the COVID-19 pandemic but these delays yielded insights that may not otherwise have been observed during an ordinary course of operations. Methods and findings from the build process are reported. [ABSTRACT FROM AUTHOR]

The High Luminosity LHC will operate at luminosities up to 7.5 times the original LHC design luminosity, and accumulate 3 times more data than originally envisioned. In order to fully exploit the physics potential of this new phase, the detectors will be significantly upgraded. Highlights of these upgrades are presented, with particular focus on new technologies. [ABSTRACT FROM AUTHOR]

In this article we give a brief historical review of particle physics achievement through e+e- colliders and proton accelerators in the last half century and perspective for the next half century with worldwide consensus. The Circular Electron Positron Collider (CEPC) is a Higgs factory proposed by Chinese scientists in 2012, and its Technical Design Report (TDR) has been completed in Dec. 2023. Since 2024 CEPC has entered into Engineering Design Report (EDR) phase and been planned to be put into construction during China's 15th five-year plan (2026-2030) and completed around 2035. The TDR results and EDR status and plan will be presented. [ABSTRACT FROM AUTHOR]

Observations of flavor anomalies in the b-sector, particularly the deviations in the measurements of the lepton flavor universality ratios in the b → cτντ transitions from the standard model (SM) predictions, suggest the existence of possible new physics beyond the SM. In the pursuit of new physics in similar decays involving b → cℓνℓ transitions, we scrutinize the decay modes Λb Λc*(2595, 2625)τ−ν¯τ beyond the SM. In particular, we examine the impact of the presence of leptoquarks in these decay modes, within the framework of the vector leptoquark U1 model. We employ form factors obtained from lattice QCD (LQCD) calculations to predict various q2-dependent observables. Some of these observables include the differential branching fraction, the ratio of branching fractions and the forward-backward asymmetry of the charged lepton. The new couplings are constrained using current b → cℓνℓ experimental data. [ABSTRACT FROM AUTHOR]

We study the 4-body angular distribution for Λb → Λc+(→ Λπ+)ℓ− ν decays and discuss various asymmetric and angular observables in the Standard Model and the new physics scenarios. Considering the new physics effects in b → cτ− ν τ transitions, we have constrained the new Wilson coefficients of the one operator and two operator scenarios from the available data on these decays. The two-operator scenario with scalar-pseudoscalar and tensor quark current provides the most plausible solution to the current data. Also, we have tested the new physics sensitivities (one or two-operator scenarios) of the different angular observables in Λb → Λc(→ Λπ+)τ− ν τ decays and found correlations among them. [ABSTRACT FROM AUTHOR]

The time-like pion form factor (FF), i.e. the cross section of the process e+e− → π+π−, is presently a matter of intense discussion within the particle physics community. The e+e− → π+π− process is the largest contributor to the hadronic vacuum polarization (HVP) correction in the Standard Model prediction of the muon anomalous magnetic moment (aμ). Recent lattice QCD evaluations of the HVP, as well as a new measurement of the pion FF by the CMD-3 collaboration, have hinted at possible shortcomings in previous measurements, thus preventing an unambiguous interpretation of the latest experimental value of aμ. An intense effort is ongoing to provide new experimental insights into the pion FF, and the BESIII collaboration aims to contribute with a new measurement of world-leading precision. In this work, preliminary studies towards such a measurement are presented. [ABSTRACT FROM AUTHOR]

The anomalous magnetic moment of the muon, aμ = (g−2)μ/2, is one of the most precisely measured observables of the Standard Model. However, its value shows a sizeable discrepancy to the Standard Model prediction. It is still under discussion whether this discrepancy is a hint for New Physics or proof of the limited understanding of strong interaction at low energies. To get a better understanding of this discrepancy, one needs to reduce the uncertainty of both, the Standard Model prediction and the direct measurement. Information on the production of pion pairs in two-photon fusion processes plays an important role in the dispersive calculation of the hadronic light-by-light scattering contribution to aμ, which is one of the two large contributions to the Standard Model predictions uncertainty. The BESIII experiment, located at the Institute of High Energy Physics in Beijing/China, offers a perfect testbed for the investigation of two-photon processes at small momentum transfers. The process e+e− → e+e−π0π0 is measured at the BESIII experiment at center-of-mass energies between 3.77 and 4.59 GeV with a total integrated luminosity of more than 13 fb−1, with more data being available in future. This presentation will discuss the current status of the analysis. [ABSTRACT FROM AUTHOR]

We report on progress in full quantum understanding of thermalization in non-Abelian gauge theories. Specifically, we test the eigenstate thermalization hypothesis for (2+1)-dimensional SU(2) lattice gauge theory. [ABSTRACT FROM AUTHOR]

We discuss a quantitative "double copy" between radiation from shockwave collisions in Einstein gravity and in QCD. The correspondence extends to 2 → N amplitudes in Regge asymptotics. The classicalization and unitarization of these amplitudes at maximal occupancy, corresponding to black hole and Color Glass Condensate (CGC) states respectively, are described by the emergent Goldstone dynamics of wee partons. We outline some consequences of the universal dynamics on both sides of the correspondence. [ABSTRACT FROM AUTHOR]

In this contribution we will discuss the production of Σ0 baryons in Ag+Ag collisions at 1.58AGeV beam energy measured by HADES. The experimental upgrade with an electromagnetic calorimeter enables a clear reconstruction of the Σ0. The first sub threshold Σ0 production in A+A collisions is compared to available p+p data as well as transport calculations and statistical hadronisation models. [ABSTRACT FROM AUTHOR]

PHENIX observed a 20% suppression in the production of high pT neutral pions in the most central (0-5%) d+Au collisions at 200 GeV. Through the simultaneous measurement of high pT direct photons (γdir) and π0 production for event samples selected by event activity, the final state effects could be disentangled from cold-nuclear-matter effects and event-selection biases that are inherent in using the standard Glauber model. This isolation of final state effects is achieved by approximating the nuclear modification factor by the double ratio RxA = (γdir/π0)pp/(γdir/π0)xA. While the cold-nuclear-matter effects in x+A collisions cancel in the (γdir/π0) ratio, the effective number of binary collisions is given by NCollEXP = γxAudir / γppdir, which eliminates the dependence on the Glauber model. In addition, many systematic uncertainties cancel in the double ratio. [ABSTRACT FROM AUTHOR]

The PHENIX experiment at RHIC has a unique large rapidity coverage (1.2 < |y| < 2.2) for heavy flavor studies in heavy-ion collisions. This kinematic region has a smaller particle density and may undergo different nuclear effects before and after the hard process when compared to mid-rapidity production. The latest PHENIX runs contain a large data set which allows, for the first time, the study of heavy flavor and J/ψ flow at the large rapidity region in Au+Au collisions at √SNN =200 GeV. This measurement has the potential to reveal a medium evolution distinct from that known at mid-rapidity. [ABSTRACT FROM AUTHOR]

We investigate the effect of chiral mixing on dilepton production by combining the in-medium spectral function in the chiral effective field theory with the state-of-the-art fluid dynamical simulations. We compare the spectral functions with different chiral symmetry restoration scenarios: without chiral symmetry restoration, with chiral symmetry restoration, and the lowtemperature mixing theory extrapolated to high-temperature. We find that the scenario with proper chiral symmetry restoration that takes into account the degenerate ρ and a1 mesons leads to an increase of the yield in the window of 1.1 < M < 1.4 GeV. Whereas, the extrapolated low-temperature theorem leads to a substantial overestimate at M = 1.2 GeV. [ABSTRACT FROM AUTHOR]

Recent measurements of femtoscopic correlations at NA61/SHINE unravel that the shape of the particle emitting source is not Gaussian. The measurements are based on Lévy-stable symmetric sources, and we discuss the average pair transverse mass dependence of the source parameters. One of the parameters, the Lévy exponent α, is of particular importance. It describes the shape of the source, which, in the vicinity of the critical point of the QCD phase diagram, may be related to the critical exponent η. Its measurement hence may contribute to the search for and characterization of the critical point of the phase diagram. [ABSTRACT FROM AUTHOR]

We report the first results on collision energy and particle mass dependence of directed flow v1 of light- and hyper-nuclei in mid-central Au+Au collisions at center of mass energies per nucleon pair of 3.0, 3.2, 3.5, and 3.9 GeV. All data have been collected by the STAR experiment in the fixed-target mode during the second phase of the RHIC beam energy scan. The mid-rapidity v1 slope, dv1/dy|y=0, of hyper-nuclei shows a similar energy and particle mass dependence to that of light-nuclei. The results suggest that the coalescence mechanism plays a dominant role in the formation of light- and hyper-nuclei. [ABSTRACT FROM AUTHOR]

Light nuclei might be formed in heavy-ion collisions by the coalescence of produced (anti-)nucleons or transported nucleons. Due to their low binding energies, they are more likely to form at later stages of the hadronic fireball. In this proceedings, we report the transverse momentum and centrality dependence of elliptic (v2) and triangular (v3) flow of d, t, and 3He in Au+Au collisions at √SNN = 14.6 - 54.4 GeV. The mass number scaling of v2(pT) and v3(pT) of light nuclei is discussed. We also report the comparison of v2(pT) and v3(pT) of light nuclei with a transport-plus-coalescence model calculation. [ABSTRACT FROM AUTHOR]

We simulate the space-time dynamics of high-energy collisions based on a microscopic kinetic description, in order to determine the range of applicability of an effective description in relativistic viscous hydrodynamics. We find that hydrodynamics provides a quantitatively accurate description of collective flow when the average inverse Reynolds number Re−1 is sufficiently small and the early pre-equilibrium stage is properly accounted for. By determining the breakdown of hydrodynamics as a function of system size and energy, we find that it is quantitatively accurate in central lead-lead collisions at LHC energies, but should not be used in typical proton-lead or proton-proton collisions, where the development of collective flow cannot accurately be described within hydrodynamics. [ABSTRACT FROM AUTHOR]

In these proceedings, we present transverse momentum dependence of the mid-rapidity slope of directed flow (dv1/dy|y=0) for π+ and KS0 in Au + Au collisions at √SNN = 3.0, 3.2, 3.5, and 3.9 GeV. Both π+ and KS0 show negative v1 slope at low pT (pT < 0.6 GeV/c). Collision energy dependence of v1 slope and pT -integrated v2 for π±, KS0, and Λ are also presented. A comparison to JAM model calculations indicates that spectator shadowing can lead to anti-flow at low pT. In addition, a breaking of the Number of Constitute Quark (NCQ) scaling of elliptic flow (v2) is observed at √SNN = 3.2 GeV, which implies the dominance of hadronic degrees of freedom occurs in collisions at √SNN = 3.2 GeV and below. [ABSTRACT FROM AUTHOR]

A novel three-fluid dynamical model for simulations of heavy-ion collisions at RHIC Beam Energy Scan programme, called MUFFIN, has been developed. The novelty consists of modular inclusion of the Equation of State, use of hyperbolic coordinates that allow to simulate higher collision energies, and fluctuating initial conditions. The model reproduces rapidity and pt spectra of collisions from √SNN = 7.7 to 62.4 GeV. Ideal fluid is assumed, and the elliptic flow is over-predicted, particularly at lower collision energies. [ABSTRACT FROM AUTHOR]

The rapid expansion of the fireball created in a heavy-ion collision causes strong departures from equilibrium. Such effects are especially important in the very early phase of the collision, bringing a substantial pressure asymmetry. The longitudinal pressure is much smaller than the transverse one. We investigate effects of this early stage pressure asymmetry in a kinetic model without boost-invariance. In the kinetic evolution the asymmetry results from the compettion of the longitudinal expasnion rate and th erelaxation rate. Unlike the transverse flow, the directed flow is found to be very sensitive to the equilibration rate and the pressure anisotropy. [ABSTRACT FROM AUTHOR]

The chiral magnetic/vortical effect (CME/CVE) in heavy-ion collisions probes the topological sector of Quantum Chromodynamics, where P and CP symmetries are violated locally in strong interactions. However, the experimental observables for the CME/CVE are dominated by backgrounds related to elliptic flow and nonflow. We employ event shape approaches to mitigate the flow background and event planes based on spectators to minimize the nonflow background. We report on the CME search in Au+Au collisions at √SNN = 7.7, 14.6, 19.6, 27, and 200 GeV, as well as the CVE search at 19.6 and 27 GeV. [ABSTRACT FROM AUTHOR]

A Bayesian calibration, using experimental data from 2.76 A TeV Pb-Pb collisions at the LHC, of a novel hybrid model is presented in which the usual pre-hydrodynamic and viscous relativistic fluid dynamic (vRFD) stages are replaced by a viscous anisotropic hydrodynamic (VAH) core that smoothly interpolates between the initial expansion-dominated, approximately boost-invariant longitudinally free-streaming and the subsequent collision-dominated (3+1)- dimensional standard vRFD stages. This model yields meaningful constraints for the temperature-dependent specific shear and bulk viscosities, (η=s)(T) and (ζ=s)(T), for temperatures up to about 700MeV (i.e. over twice the range that could be explored with earlier models). With its best-fit model parameters the calibrated VAH model makes highly successful predictions for additional pT-dependent observables for which high-quality experimental data are available that were not used for the model calibration. [ABSTRACT FROM AUTHOR]

In these proceedings, we present new measurements from STAR of the global spin alignment(ρ00) of ϕ mesons in Au+Au collisions at √SNN = 19.6, 14.6 GeV using BES-II data and of J/ψ mesons in isobar collisions 4496Ru + 4496Ru and 4096Zr + 4096Zr at √SNN = 200 GeV. The energy-dependent spin alignment for ϕ mesons from BES-II data is consistent with that published from BES-I and showcases a significant improvement in precision. We performed a new measurement assessing the rapidity dependence of ϕ meson ρ00, and our findings are consistent with theoretical predictions. The global spin alignment of J/ψ mesons with respect to first order event plane aligns with a value of 1/3 within the statistical error. Additionally, we discuss the procedure of measuring the global spin alignment of ρ0 mesons at RHIC and provide the projection for errors. [ABSTRACT FROM AUTHOR]

The chiral magnetic effect (CME) in high-energy heavy-ion collisions arises from the interplay between the chirality imbalance and the intense magnetic field and will cause a charge separation along the magnetic field direction. While the CME search is still ongoing in experiments, the non-CME contributions need to be excluded from the CME observables. In this work, we examine the influence of globally spin-aligned ρ mesons on the γ112 correlator, the RΨ2(ΔS) correlator, and the signed balance functions, via a toy model and a multiphase transport model (AMPT). We find that the CME observables are sensitive to the 00-component of the spin density matrix, ρ00: they receive positive (negative) contributions when ρ00 is larger (smaller) than 1/3. [ABSTRACT FROM AUTHOR]

In this presentation I will give brief overview of the main physics topics which will be explored at the new Deep Inelastic Scattering facility, the Electron Ion Collider (EIC), planned for the construction at Brookhaven National Laboratory in the United States. [ABSTRACT FROM AUTHOR]

This is a theoretical overview of the new results regarding open heavy flavor and quarkonium presented in the Quark Matter 2023 conference. [ABSTRACT FROM AUTHOR]

Electromagnetic probes such as photons and dileptons (l+l−) are a unique tool to study the space-time evolution of the hot and dense matter created in heavy-ion collisions, since they are emitted at all stages of the collision with negligible final-state interactions. In this article, the latest results on soft photon (real and virtual) production in heavy-ion collisions are presented. [ABSTRACT FROM AUTHOR]

I review developments of how compact table-top setups with ultracold atoms can help us to understand the more complex real-time dynamics of QCD probed in heavy-ion collision experiments. [ABSTRACT FROM AUTHOR]

Light nuclei, antinuclei and hypernuclei constitute a laboratory to study the mechanisms of formation of bound states in proton-proton and nucleus-nucleus collisions over a broad range of collision energies, providing insights into the nuclear structure as well as into the strong interaction. In this contribution, a selection of the experimental results and latest developments presented at the Quark Matter 2023 conference is reviewed. [ABSTRACT FROM AUTHOR]

We discuss recent progress towards developing accurate initial state descriptions for heavy ion collisions focusing on weak coupling based approaches, that enable one to constrain the high-energy structure of nuclei from deep inelastic scattering or proton-nucleus collisions. We review recent developments to determine the event-by-event fluctuating nuclear geometry, to describe gluon saturation phenomena at next-to-leading order accuracy, and to include longitudinal dynamics to the initial state descriptions. [ABSTRACT FROM AUTHOR]

As an important set of thermodynamic quantities, knowledge of the equation of state over a broad range of temperatures and chemical potentials in the QCD phase diagram is crucial for our understanding of strongly-interacting matter. There is a good understanding from first-principles results in lattice QCD, perturbative QCD and chiral effective field theory about the equation of state. However, these approaches are valid in different regimes of the phase diagram, and therefore, a method of providing an equation of state that covers a full range of the phase diagram involves matching together these results with appropriate models in order to fill in the gaps between these regions. Furthermore, with such equations of state, important questions about QCD phase structure can begin to be addressed, such as whether there is a critical point in the QCD phase diagram. In this contribution to the proceedings, equations of state from first-principles and effective theories will be discussed in order to understand how QCD thermodynamics is affected by the presence of a critical point. [ABSTRACT FROM AUTHOR]

We overview recent theoretical developments in the search for QCD critical point at finite temperature and density, including from lattice QCD, effective QCD theories, and proton number cumulants in heavy-ion collisions. We summarize the available constraints and predictions for the critical point location and discuss future challenges and opportunities. [ABSTRACT FROM AUTHOR]

The phase diagram of strong interaction has been a subject of intense theoretical and experimental research. One of the big questions in this regard is whether a critical endpoint is associated with the phase transition of strongly interacting matter. There have been rapid theoretical developments to answer this question. On the experimental side, a tremendous effort is put forward to hunt for the critical point in collisions of atomic nuclei. This article gives an experimental overview of some of the key results for critical point searches, mainly focusing on net-proton number fluctuations in nuclear collisions. [ABSTRACT FROM AUTHOR]

We discuss recent theoretical developments in understanding the early pre-equilibrium dynamics and onset of hydrodynamic behavior in high-energy heavy-ion collisions. We highlight possible experimental signatures of the pre-equilibrium phase, and present recent progress in developing a consistent theoretical description of collective flow in small systems. [ABSTRACT FROM AUTHOR]

I overview the recent progress of phenomenological studies exploring collective dynamics in relativistic nuclear collisions to understand various QCD properties. Originally, collectivity was interpreted as a manifestation of the hydrodynamic behaviour of the QGP as a response to the initial collision geometry. Over the past decade, however, particularly following the experimental observation of momentum azimuthal anisotropy in small colliding systems, pioneering studies have demonstrated the possibility of other interpretations. In this talk, I highlight recent studies aimed at understanding various QCD properties at different collision stages through the lens of collectivity and emphasize the importance of establishing Monte Carlo event generators for relativistic nuclear collisions. [ABSTRACT FROM AUTHOR]

One of the most studied phenomena in heavy-ion physics is the collective emission of particles. Historically, the observation of collectivity in nucleus-nucleus collisions has been viewed as proof of the creation of a strongly interacting medium, as neither independent particle emission nor hadronic interactions alone could account for measurements. Intriguingly, collective particle emission was recently also measured in small collision systems, ranging from proton-proton to even high-multiplicity e+e− collisions. In these proceedings, I will elaborate on the current status of the experimental findings regarding collectivity and discuss their implications for the future. [ABSTRACT FROM AUTHOR]

I review recent progress in lattice QCD calculations of the QCD phase diagram and equation of state at non-zero temperature and baryochemical potential. I also discuss some connections with heavy ion collisions. [ABSTRACT FROM AUTHOR]

NA61/SHINE is a multipurpose fixed-target experiment at the CERN Super Proton Synchrotron. The main goals of the NA61/SHINE strong interaction program are to discover the critical point of strongly interacting matter as well as to study the properties of produced particles relevant for the study of the onset of deconfinement – the transition between the state of hadronic matter and the quark-gluon plasma. An analysis of hadron production properties is performed in proton-proton, proton-nucleus and nucleus-nucleus interactions as a function of collision energy and size of the colliding nuclei to achieve these goals. The NA61/SHINE results from a strong interaction measurement program are presented. In particular, the latest results from different reactions Ar+Sc, Xe+La, and Pb+Pb on hadron spectra and fluctuations are discussed. Additionally, the recent measurements of kaon production in Ar+Sc collisions at √SNN = 11.94 GeV are mentioned. The NA61/SHINE results are compared with worldwide experiments and predictions of various models, like EPOS, PHSD, UrQMD, and others. [ABSTRACT FROM AUTHOR]

sPHENIX is the first new major detector at RHIC in over twenty years. It is designed for pioneering studies of the Quark Gluon Plasma and Cold QCD phenomena using high-pT jet and heavy flavor probes with a broad kinematic reach and a capability to take large statistics sets of A+A, p+p and p+A data. sPHENIX construction was completed in April 2023. It was commissioned and took first Au+Au data in the RHIC 2023 Run. This paper describes the details of the detector design, challenges of sPHENIX construction, progress on the commissioning and first data from the RHIC 2023 run. [ABSTRACT FROM AUTHOR]

The PHENIX experiment at the Relatimay invistic Heavy Ion Collider has collected data scanning system sizes from p+p and 3He+Au to Au+Au and U+U at collision energies from √SNN = 7.7 to 510 GeV. The extensive measurements from these data improve our understanding of the Quark Gluon Plasma and the origin of the proton spin. PHENIX's measurements of π0 mesons, photons, heavy flavor particles, and jets probe the formation of the QGP, and measurements of azimuthal anisotropies are sensitive to collective effects and the initial geometry of the collision. A selection of recent results from PHENIX with an emphasis on results from heavy ion collisions are discussed. [ABSTRACT FROM AUTHOR]

The STAR experiment covers a wide range of energies and collisions thanks to RHIC's versatility and STAR's recent detector upgrades. In this contribution to the proceedings of the 2023 QuarkMatter conference, we highlight our new results from the Beam Energy Scan, system-size scans at top RHIC energies using a broad range of experimental probes. [ABSTRACT FROM AUTHOR]

We present different elements of the 2021–2022 Computational Frontier (CompF) effort within the Snowmass process, including organization, events, and highlights of the final report [1]. With focus in the next 10–15 years, we analyze the impact of newly established and emerging technologies, identify challenges within theoretical, experimental and observational research programs, and present the report recommendations. We emphasize the main recommendation, which is the formation of a Coordinating Panel for Software and Computing (CPSC). [ABSTRACT FROM AUTHOR]

Big science is represented by projects like those in particle physics. Big engineering is the application of engineering principles to large-scale projects that have a significant impact on society, like popular use of AI/ML (think ChatGPT and Google Bard). Both big science and big engineering are among the noblest and boldest applications of the human intellect to understanding the universe and humanity's place in it. Both depend on human collaboration to generate the ingenuity needed to make their impacts positive ones. Both are marred by evidence of bias, particularly racial bias, that lessens intellectual diversity and hence excellence. LEIDA – Leadership on Equity, Inclusion, Diversity, and Access is needed to ensure that opportunities lost in the past due to marginalization of particular communities eventually ends and the full breadth of creativity and innovation possible determines the future of our field. [ABSTRACT FROM AUTHOR]

In recent years, quantum computing shows significant potentials in many areas. In this proceeding, we revisit the observation of the Zc(3900) resonance with quantum machine learning techniques, specifically quantum support vector machine (QSVM). Meanwhile, the outcomes are compared with classical support vector machine (SVM) method. With the IBM Qiskit toolkit, the QSVM method achieves a competitive signal and background classification accuracy compared to classical methods. This study emphasizes the potential of quantum machine learning in high-energy physics research, and it reveals the feasibility of applying quantum computing in future physics data analysis. [ABSTRACT FROM AUTHOR]